Multiple-process chilian mill



C. C. LANE.

MULTIPLE PROCESS CHILIAN MILL.

v APPLICATION FILED DEC. [2, 1916. V 1,4@,17, Patamed June 8, 1920.

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MULTIPLE PROCESS GHILIAN MILL.

APPLICATION Huan- 050.12, 1-946.

Patented June 8, 1920..

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0. C. LANE.

MULTIPLE PROCESS CHILIAN MILL.

APPLICATION FILED use, 1.2,, l9l6- Patented June 8, 1920. I

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MULTIPLE-PROCESS CHILIAN MILL.

Specification of Letters Fatent.

Patented June 8, 11920.

Application filed December 12, 1916. Serial No. 136,570.

To all whom. it may concern:

Be it known that I, CHARLES CoMs'rocK LANE, a citizen of the United States, residing at Los Angeles, in the county of Los Angeles and State of California, have in vented a new and useful Multiple-Process Chilian Mill, of which the following is a specification.

An object of the invention is to provide at low cost a superior (lhilian mill which can be mainly constructed on the ground where the mill is installed.

An object is to minimize the cost of construction and increase the output and the life of the mill.

Another object is to so construct the mill as to crush ore containing quartz, talcum, clay, and the like to extreme fineness.

It has been determined in practical metallurgy that maximized saving of values from ore can be attained by crushing the ore to the greatest possible fineness and an object of this invention is to provide a mill peculiarly adapted to effect such crushing and to do this with maximum economy of time, power and attention.

Another object of the invention is to provide means of maximized capacity, capable of being accommodated in minimized floor space and adapted for the complete reduction of the ore so as to facilitate recovery from the ore of all values therein.

In order to effect the crushing at minimum expense it is desirable to maximize the diameter of the Chilian mill and an object of this invention is to provide a Chilian mill construction which allows the mill to be made of maximum diameter at a comparatively low cost so that for a determined cost of installation a maximum output can be obtained.

Heretofore, in the construction of Chilian mills, there has been provided an annular die inside an annular trough, and rollers rolling upon said die and connected to a frame to WhlClI EIII annular spur gear is fixed to receive power from a driving pinion. The construction of such gear and the connection thereof with the bearings that are supported by the axles of the rollers become limiting factors as the diameter of the mill increases, so that in various cases it has been found impracticable to construct a Chilian mill having a die of more than ten or twelve feet diameter. An object of this invention is to increase the possibilities of building mills of this character practically without limit as to diameter.

It is found desirable to apply the power from a pinion to a spur gear of considerably greater diameter than the annular die upon which the rollers run, so that in case the die were fifteen feet in diameter, for example, the spur gear would preferably be about twenty-two feet in diameter. This calls for great structural strength inside the spur IlIIl:

An object of this invention is to provide a cheap and practical construction whereby a rim gear of large diameter can be mounted to apply power from the pinion to drive the crushing rollers.

An object of this invention is to increase the effectiveness of the mill and this I do by maximizing the space between the crushing rollers so as to allow the mill contents to settle behind each roller as the rollers advance so that portions of such contents will be quiescent on the die at the approach of a roller, thereby allowing the finer material as well as the coarse material to be crushed by the successive rollers.

An object of the invention is to provide a cheap and simple mill construction adapted to utilize a minimum number of crushing rollers with maximum diameter of die and maximum weight upon the rollers, and to produce a maximum output.

I regard the use of exactly three crushing rollers as preferable for securing stability and allowing effective settling to occur be tween the rollers, so that fineness of mill contents will be maximized, and an object is to produce a practical cheap frame of large diameter and great strength for effective mounting on three rollers only.

An object is to provide a Chilian mill that will reduce ore to slimes so as to make all the values susceptible to recovery.

This invention also includes a self-contained crushing and cyaniding mill comprised in a single unit of the Chilian type.

An object of the invention is to provide a Ghilian mill which can be constructed of sizes heretofore impracticably large and to obtain the values fromores by crushing and chemical or mechanical processes in a superior manner and with a plant covering a minimum ground space and having maximumefliciency and economy.

An object of this invention is to provide for complete treatment of ore in single unit apparatus, for the recovery of both coarse and fine free gold and also chemically combined gold, if any, by a continuous process retaining the pulp in the mill for a maximum period of time and treatment, and with a minimum occupation of floor space; thus reducing the cost of installation, maintenance and attentionand maximizing the percentage of saving.

Although the invention in its entirety ineludes a combined crushing and eyaniding mill as a single unit, the invention alsoineludes parts and combinations of parts that are not dependent upon the use of the cyaniding elements and I therefore do not limit the invention to an apparatus containing the cyaniding feature. It is understood that separation by flotation methods is analogous to recovery by cyaniding processes in that both are practicable with fine pulp and I regard the flotation processes as equivalents of c'yaniding processes where involved in the purposes of this invention.

It'will be suflicient to illustrate the invention as applied in a mill in which the final treatment of the mill contents is by a cyaniding process. Further objects, advantages and features of novelty may appear from the accompanying drawings, the subjoined detail description and the appended claims.

The accompanying drawingsillustrate the invention. 7

Figure 1 is a plan of a multiple process Chilian mill constructed in accordance with this invention and arranged for treating ore by crushin amalgamating and cyaniding processes. Parts are broken away to expose certain features of construction.

Fig. 2'is a fragmental elevation, mainly in axial section on line 00 Figs. 1 and 4, the return pipe being displaced to show that it discharges into the launder. V

Fig. 3 is a side elevation of a mill of larger diameter than that shown in Fig. 1.

Fig. 4 is a sectional elevation on irregular line m, Fig. 1 and line a Fig. 2, the re turn pipe being displaced to show that it discharges into the launder.

The annular channel member 1, the die 2, center post 3, the crushing rollers including tires 4, bodies 5 and axles 6, the bearings 7, supporting springs 8, yokes 9, supporting bolts 10, bearing standards 11 and other attachments and adjuncts, as the rim gearing 12, pinion 13, shaft 14, step 15, bolts 16, 1.7, metal reinforcements 18 and tank 19 are all made at the factory and are shipped in knock-down form to the mill site, where the mill is to be installed.

The channel'member 1 and rim gearing may be made in segmental sections for convenience of manufacture and transportation. Cement and other required material for foundation superstructure and gear-Wheel will also be brought to the mill site.

The ground is then prepared and a foundation 20 is made for the pan 21. Then a form, not shown, is constructed in which the pan 21 may be molded of cementitious material such as reinforced concrete. The construction of pan.21 is then proceeded with and channel 1 is put in place on the concrete bottom of the pan during the process of construction; the cementitious material being molded about the channel member so that the same will befinally set and Wellsupported in the pan to form the bottom thereof. The center post 8 will be set in the cement body at the axis of the pan with the anchor pin 3" in place and the cement hub 22 of the pan will be formed about the same with basin 22 formed therein. and drain 22 leading therefrom.

' Then the annular die 2 will be laid on top of the annular channel member 1 and made perfectly level and wedged in place by wedges 2".

Then the rollers formed of parts 4, 5, will be placed in position on the annular die with their axes nearly radial to the axis of the pan; and-the bearings, springs, yokes, bolts and standards 7, 8, 9, 10, 11 will be assembled and the standards 11 brought to upright position, and fixed to a central support 25 journaled on post 3.

Then a layer 23 of wooden plank or other suitable material is laid on and secured to the tops of the bearing standards and reinforced by a layer 24 of cross plank or other material, thus forming a platform or frame, and the bolts 17 or equivalents thereof, which in some instances may be simply round pins, not shown, will be set in and will project up from the platform formed of the layers 23, 24. The periphery of the platform may then be inscribed from the produced 26 of the pan 21. and the platform is then shaped to a perfect circle having the produced axis of the pan as center. During the process of constructing the platform or frame a central orifice is provided to accommodate the upper end of the post 3 and center bearing 25 for the post 3.

Then the annular built-up rim or reinforcement 27 will be built upon the rim of the platform, said rim reinforcement being preferably made of superposed segmental pieces a, b, c, of plank or of any other con venient and suitable material in desired form of construction.

The cast metal segments (Z going to make up the rim gearing 12 are provided with overlapping cap flanges 28 which are adapted to fit on the built-up rim 27 and the same will be applied to the rim 27 and fixed thereto by the bolts 16 passed up through the platform and rim and secured by nuts 30. The central orifice 29 is also inscribed from the produced axis of the pan, and circular forms, not shown, are provided at the margins of said platform, so that a cementitious monolith may be molded therebetween and on the platform.

The outer annular form, not shown for molding the annular body 31 of the platform will be applied on top of the overlapping cap of the annular gear, and the monolith, preferably of reinforced concrete, will be cast in the form thus erected and its top will be made fiat and smooth at the desired height above the platform to secure the required thickness and weight.

In case wooden pins have been used in lieu of the bolts 17 during the molding of monolith 31, such pins may be driven out when the cement is sufficiently set, and afterward the requisite bolts 17 for fastening the top plates 11 of the bearing standards 11 to the monolith will be inserted up through said plates, platform and body 31 and will be secured by nuts 32 on top of the monolith.

Then a suitable tank foundation 33 will be laid on the monolith, the same spaced from and extending above the level of the bolts and nuts, and then an annular tank 19 will be mounted or built on top of said foundation, thus completing the mill body. Then the first launder 35, suction pipe 36, pump 37, pipe 38, and spiral launder 39 and the external power applying means as driving machinery 15, 14, 13 and power apparatus, not shown, may all be installe Z and the mill is thus made ready for opera tion.

In practical operation the ore may be fed either centrally through pipes, as in former constructions, or may be fed by a trough 40, over the side of the pan. The ore fed into the pan forms a bed over the die 2, and the rollers run upon such bed of ore, thus forcing ore against ore and effecting the pulverization by attrition of the pieces of ore, one against another, rather than ,loy the crushing action of the rollers.

'In practice a charge of mercury, not shown, is supplied to the channel, and the mill body, comprising the rollers and the parts supported thereby, may rise and de scend about 211; inches, more or less, to accommodate the depth of solid material not shown on the die, and ordinarily the mill should be so fed that the layer of ore above the die will be sufliciently deep so that the mill body will be raised to such a height that the bottoms of the rollers will be about 2} inches above the face of the die, thus to cause the-pieces of broken ore to be ground on each other as the rollers press thereon.

As the operation of the mill proceeds the pan fills until the pulp will overflow through the sluice c into the first launder 35 from which it is pumped through the pipe 36 by pump 37 and through the pipe 38 into the spiral top launder 39 for delivery to the cyaniding tank.

The free gold settling to the mercury charge is amalgamated thereby and will be recovered in the final clean-up.

The monolithic web 31 fixed to the platform constitutes with the platform, the peripheral rim27 and rim gearing 12, an integrally weighted and evenly balanced connection for transmitting power from an external source, as the pinion 13, to the hear.- ing frames 11, thus maximizing strength in a cheap built-up construction and at the same time supplying required weight and rigidity to apply the power with a steady movement due to momentum and inertia and not responding to jerks or jars.

The treating tank 19 has a floor 40 and an outer annular wall 41 and inner annular wall 42 fixed to said floor.

The monolith 31 is formed with a central orifice 43 to correspond to the orifice through the inner annular wall 42 of the cyaniding tank and the outer wall 41 has a downwardly extending flange 44 to fit the tank foundation 33 on the monolith 31.

The spiral launder 39 having an outlet 45 is arranged to receive in its upper limb the material delivered from the pulp delivery pipe 38, and to deliver through outlet 45, into the deep compartment 46 of the cyaniding tank 19. Said tank is shown constructed with a plurality of compartments formed by the partitions 47, 48, 49, 50, 51 and 52 ofsuccessively decreasing depths, which separate the tank into successively shallowing compartment 46, 53, 54, 55, 56, 57 into which the cyanid solution will successively pass. The last and shallowest of said compartments is provided with means 58 for drawing off the top of the contents thereof. The cyanid solution may thus be drawn off continuously through pipe 58 to the circular collecting basin 22 from which it flows through pipe 22 to any suitable receptacle as a precipitating tank 58 well known in the art for treatment of such solution.

The plates 11 of the standard 11 project into the central orifice 30 and the spider 11" having a central hub slidingly journaled on the top of the post 3 tends to maintain the crushing apparatus formed of the rollers and the parts supported thereby in true axial relation to the pan. The face of the pinion 13 is of ample width to allow the crushing structure to rise and fall the required distance at the initial charging and the final clean-up, without withdrawing the rim gear from the pinion.

The springs 8 yield to allow the individual rollers to rise over lumps or piles of material without obstructing the operation or tilting the crushing body as a whole- VVhen it is desired to remove the tailings from the tank 19 this may be done by shoveling the same out of the several compartments or by any other suitable means.

The rigid weight body 31 is thick and heavy and practically joined as a single unit or web, to the rim gearing, and in the large size mills built in wooded country a substantial equivalent for the monolithic body may be built up of heavy squared and joined logs fixed to the rim and to the tops of the standards, and the central support, substantially as is the case with the monolith shown in Figs. 2 and 4.

Draw-off. channels 59 controlled by gates 60 may be provided for each compartment to draw off. the contents of said compartments respectively while the mill is in operation. The material thus drawn off will consist of material coarser than the slimes drawn off to the precipitating tank 58 through pipe 58, and such comparatively coarse material will bepassed back into the pan for further pulverization, and so on until the material is all reduced to slimes.

In the smaller mills it may sometimes be feasible to cast the weighted disk 31 having a central aperture therethrough as a single metal casting, and I do not wish to limit myself to constructing the weight-like disk.

of cement. An important advantage gained by the monolithic structure or its equivalent is the great rigidity of the connection between the driving means at the rim of the crushing apparatus and the bearing standards of the crushing rollers. However, whether the weight body 31 is of metal or whether it is a monolith, its evenly balanced construction, which is clearly illustrated in Figs. 2 and 4:, has the advantage over the weight distribution shown in mills, in which the crushing rollers are weighted by a plurality of stones, pieces of scrap iron, or any other easily shiftable weight material in a receptacle above the rollers, that it is conducive to a more even running of the mill and will thus prolong the life thereof and in a more even and satisfactory manner per form the ore crushing operation than is possible by mills of other construction.

I claim:

1. In a mill a crushing element comprising a frame, an evenly balanced weight comprising a solid monolith molded onto and made practically an integral part of said frame, journal bearings connected to said frame, and crushing rollers j ournaled in said bearings.

2. In a Chilian mill a superstructure for the crushing apparatus comprising a frame provided with a raised circular rim, rim

gearing around said rim, a circular, evenly balanced and solid. monolith, cast upon and made an integral part of said framev and rim and connected to the roller bearings of the mill toweight the same,

3.. In a Chilian mill.- a superstructure for. the, crushing apparatus comprising a frame provided with a circular rim, gearing-thereon, a circular evenly balanced and solid monolith cast upon and made integral with said frame and connected to the roller bearings of the mill to weight the same, crushing rollers journaled under the weight and a tank rigidly mounted on said monolith and adapted to receive pulp from the path of the rollers for further treatment of the of the charge and tank. to assist in crushing I the ore which supplies such pulp.

4. A Chilian mill comprising a circular platform; bearings fixed to the under-side of said platform; crushing rollers j ournaled in said bearings; a peripheral toothed rim fixed to the periphery of the platform and an evenly balanced and solid monolith molded upon and made integral with the platform and constituting with the platform and its peripheral rim an integral weighted connection for the bearings and toothed rim.

5. In a Chilian mill a wheel for transmitting power to the crushing rollers, said wheel being constructed of a platform, a circular rim fixed thereon and adapted to receive the application of power from an eX- ternal source, and an evenly balanced and solid web of reinforced concrete molded upon and made an integral part of said platform and rim to form a weight for the crushing rollers, said platform and web be ing adapted to be connected to and supported by the crushing rollers.

6. In a Chilian mill a wheel for transmitting power to the crushing rollers, said wheel comprising a platform, a circular rim fixed thereon and adapted to receive the application of power from an external source; and an evenly balanced and solid web of reinforced concrete forming the foundation for a tank, said web molded upon and made integral with said platform and rim to form a weight for the crushing rollers, said platform being adapted to be connected to and supported by the crushing rollers; and a tank on said foundation, adapted to receive the product from the crushing rollers for further treatment in order to recover values from such product.

7. In a Chilian mill the weighted wheel set forth for the effective operation of the crushing rollers, said wheel comprising a plank platform, a built-up annular rim at the edge of said platform, gearing on said rim and an evenly balanced and solid monolith structure cast integrally onto said platform and against said built-up rim.

8. A Chilian mill comprising rollers, journal bearings for the rollers, a wheel having an evenly balanced and solid monolithic web carried by said bearings and adapted to revolve the rollers, a tank mounted on said web, and means to supply pulp produced by the Chilian mill to said tank for the purpose of treating the pulp therein and then returning it to the mill.

9. A mill comprising a pan, rollers in the pan, a wheel having an evenly balanced and solid monolithic web cast upon the wheel and made integral therewith and being arranged to weight the rollers and to revolve the same in the pan; a tank mounted on said web and means to deliver to the tank material flowing from the pan.

10. A double treatment mill comprising an amalgamating pan, rollers to crush ore in said pan, an evenly balanced, solid and integrally constructed weight for and above said rollers, a tank adapted for the treatment of the overflow from said pan, and means to deliver such overflow to the tank for further treatment.

11. In combination, a Chilian mill having grinding rollers, a frame on the rollers, and a channel below the grinding rollers; a cyaniding apparatus superposed upon the frame and means to deliver to the cyaniding apparatus material that overflows from the channel; the cyaniding apparatus being adapted to treat the overflow material.

12. In combination, a Chilian mill having a grinding apparatus and a cyaniding apparatus on the grinding apparatus; means to deliver to the cyaniding apparatus material that overflows from the grinding apparatus; the cyaniding apparatus being adapted to treat the overflow material; and means for conducting the grinding operation while the cyaniding operation is in progress.

13. In a Chilian mill the combination with a pan, a central post, a die and rollers on the die of bearing standards; bearings supported by the rollers and supporting said standards; a central support connecting said standards and journaled on the post; an evenly balanced and solid practically integral weight body molded upon and fastened to the tops of said standards, and a rim gear fixed to the periphery of said body to receive power for revolving the wheels on the die.

14. A Chilian mill comprising a pan having a central hub with a basin therein and a drain therefrom, an annular die in the pan, rollers on the die, standards supported by the rollers, a disk-like weight on the standards, a-rim gear fixed to the weight, said weight having a central orifice, a tank mounted on the weight and having a central orifice, means to deliver overflow from the mill to the tank, means to deliver slimes from the tank through the orifices to the basin and thence to the drain for further treatment, and means to discharge the sediment from the tank to the pan for re-treatment.

15. In combination with a pan, a die therein, rollers on the die, a weight supported by the rollers, means on the rim of the weight adapted to be driven from an external source of power, a tank on the Weight, means to deliver overflow from the pan to the tank, a pipe leading from the tank above the bottom thereof to conduct slimes from the tank for further treatment, and pipes extending down from the tank through the Weight and provided with gates to deliver the sediment from the tank to the pan.

16. In combination with a Chilian mill, atank superposed on said'mill, partitions of different heights in the tank for the treatment of material therein by successive stages, means to deliver slimes to the deepest of the compartments formed by said partitions, means to conduct slimes from a shallow compartment of the tank for fur ther treatment, and means to conduct sediment from the tank to the mill for further treatment.

17. In a Chilian mill, a crushing element comprising a frame, a pan and crushing rollers therein; and an evenly balanced and solid weight located above the rollers and incorporated with and made a permanent part of the crushing element.

18. In a Chilian mill, a crushing element comprising a frame, a pan and crushing rollers therein; a platform above the rollers; a tank above the platform; and an evenly balanced and solid weight molded or cast into and made an integral part of the mill between the platform and the tank.

In testimony whereof, I have hereunto set my hand at Los Angeles, California, this 6th day of December 1916.

CHARLES 0. LANE.

Witness:

JAMES R. TOWNSEND. 

